
$(document).ready(function(){
	var ls_password_tip = document.getElementById("ls_password_tip");
	var ls_password = document.getElementById("ls_password");
	ls_password_tip.onfocus = function(){
		if(this.value != "密码") return;
		this.style.display = "none";
		ls_password.style.display = "block";
		ls_password.value = "";
		ls_password.focus();
	};
	ls_password.onblur = function(){
		if(this.value != "") return;
		this.style.display = "none";
		ls_password_tip.style.display = "block";
		ls_password_tip.value = "密码";
	};
});